Global Patent Index - EP 2258535 A2

EP 2258535 A2 20101208 - Heating device for plastic blanks

Title (en)

Heating device for plastic blanks

Title (de)

Erwärmungsvorrichtung für Kunststoffrohlinge

Title (fr)

Dispositif de chauffage pour ébauches en plastique

Publication

EP 2258535 A2 20101208 (DE)

Application

EP 10160129 A 20070510

Priority

  • EP 07725075 A 20070510
  • DE 102006022207 A 20060511

Abstract (en)

The preform (1) has a region designated for heating and a further region which is not to be heated. The region to be heated is subjected to microwaves in a resonator. All of this region is heated simultaneously. It is alternatively heated progressively in steps or sections. The region is moved and/or heated continuously. The preform is moved longitudinally (A) or at right angles to this direction, into or through the disc- or plate-shaped resonator (11) which completely surrounds it. The path of preform movement, projected into the extended plane of the (TE wave) resonator during heating, is essentially circular. Movement through the resonator takes place repeatedly, no less than twice. This movement is superimposed on the circular movement, which is followed by the resonator. Preform temperature is measured internally and/or externally, once or more times, during the operation. The value is sent to a controller for the following heating process, or to control heating of the present preform. In an adjustment method, by measuring the temperature profile of the preform and comparison with a desired profile, the field strength distribution in the resonator is adjusted accordingly. Variants of these procedures are described, in accordance with the foregoing principles. Salient features include an optionally-moving microwave reflector, delivery to an associated polyethylene terephthalate (PET) stretch-blowing process. Heating may be intentionally non-uniform over the length, thickness and/or circumference. Microwave heating is supplemented by infra red heating. A microwave generator feeds the ring resonator. The equipment is further detailed. An independent claim IS INCLUDED FOR corresponding equipment.

Abstract (de)

Die Erfindung betrifft eine Verfahren und eine Vorrichtung zum Erwärmen von Vorformlingen (1) aus einem thermoplastischen Material, wobei die Vorformlinge (1) nach ihrer Erwärmung einem Umformvorgang unterzogen werden und wobei die Vorformlinge (1) zumindest während eines Teils der zeitlichen Dauer der Erwärmung in einem Resonator (11) mit Mikrowellen beaufschlagt werden.

IPC 8 full level

B29C 35/08 (2006.01); B29C 49/12 (2006.01); B29C 49/36 (2006.01); B29C 49/64 (2006.01); B29C 49/68 (2006.01); H05B 6/80 (2006.01)

CPC (source: EP US)

B29B 13/024 (2013.01 - EP US); B29C 49/6418 (2013.01 - EP US); B29C 49/68 (2013.01 - EP US); B29C 49/786 (2013.01 - EP US); H05B 6/80 (2013.01 - EP US); B29C 49/06 (2013.01 - EP US); B29C 49/12 (2013.01 - EP US); B29C 49/36 (2013.01 - EP US); B29C 49/4205 (2013.01 - EP US); B29C 49/6436 (2013.01 - EP US); B29C 49/6445 (2013.01 - EP US); B29C 49/6454 (2013.01 - EP US); B29C 2035/0855 (2013.01 - EP US); B29C 2949/0715 (2022.05 - EP); B29K 2023/00 (2013.01 - EP US); B29K 2023/086 (2013.01 - EP US); B29K 2027/06 (2013.01 - EP US); B29K 2033/20 (2013.01 - EP US); B29K 2067/00 (2013.01 - EP US); B29K 2069/00 (2013.01 - EP US); B29K 2077/00 (2013.01 - EP US)

Citation (third parties)

Third party :

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007131701 A2 20071122; WO 2007131701 A3 20080306; AU 2007251881 A1 20071122; AU 2007251881 B2 20110331; CA 2652020 A1 20071122; CA 2652020 C 20140819; CN 101454142 A 20090610; CN 101454142 B 20130508; EP 2021161 A2 20090211; EP 2021161 B1 20160427; EP 2210728 A2 20100728; EP 2210728 A3 20120822; EP 2210728 B1 20150826; EP 2210731 A2 20100728; EP 2210731 A3 20120822; EP 2210731 B1 20161221; EP 2213434 A2 20100804; EP 2213434 A3 20120822; EP 2213435 A2 20100804; EP 2213435 A3 20120822; EP 2213435 B1 20140910; EP 2258535 A2 20101208; EP 2258535 A3 20120822; EP 2258535 B1 20140917; EP 2937204 A1 20151028; EP 2937204 B1 20190626; EP 2939816 A1 20151104; EP 2939816 B1 20180131; EP 3098057 A2 20161130; EP 3098057 A3 20170308; JP 2009536589 A 20091015; JP 2012254644 A 20121227; JP 5227949 B2 20130703; JP 5567085 B2 20140806; US 2010052224 A1 20100304; US 8231823 B2 20120731

DOCDB simple family (application)

EP 2007004154 W 20070510; AU 2007251881 A 20070510; CA 2652020 A 20070510; CN 200780017734 A 20070510; EP 07725075 A 20070510; EP 10160125 A 20070510; EP 10160126 A 20070510; EP 10160127 A 20070510; EP 10160129 A 20070510; EP 10160130 A 20070510; EP 15164794 A 20070510; EP 15164845 A 20070510; EP 16166840 A 20070510; JP 2009508252 A 20070510; JP 2012204473 A 20120918; US 30058907 A 20070510